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How to avoid mysql 'Deadlock found when trying to get lock; try restarting transaction'
I have a innoDB table which records online users. It gets updated on every page refresh by a user to keep track of which pages they are on and their last access date to the site. I then have a cron that runs every 15 minutes to DELETE old records.
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Is it possible to run selenium (Firefox) web driver without a GUI?
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What you're looking for is a headless-browser.
Yes, it's possible to run Selenium on Firefox headlessly. Here is a post you can follow.
Here is the summary steps to set up Xvfb
#install Xvfb
sudo apt-get install xvfb
#set display number to :99
Xvfb :99 -ac &
export DISP...
How to check if mysql database exists
Is it possible to check if a (MySQL) database exists after having made a connection.
21 Answers
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Why does Python pep-8 strongly recommend spaces over tabs for indentation?
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The answer was given right there in the PEP [ed: this passage has been edited out in 2013]. I quote:
The most popular way of indenting Python is with spaces only.
What other underlying reason do you need?
To put it less bluntly: Consider also the scope of the PEP as stated in the very first...
Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in Java
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The parameter of exit should qualify if the execution of the program went good or bad. It's a sort of heredity from older programming languages where it's useful to know if something went wrong and what went wrong.
Exit code is
0 when execut...
LinkedBlockingQueue vs ConcurrentLinkedQueue
My question relates to this question asked earlier. In situations where I am using a queue for communication between producer and consumer threads would people generally recommend using LinkedBlockingQueue or ConcurrentLinkedQueue ?
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Animated GIF in IE stopping
... make animated GIF's continue to be animated after you click a link or submit a form on the page your on in IE? This works fine in other browsers.
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Truly understanding the difference between procedural and functional
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Functional Programming
Functional programming refers to the ability to treat functions as values.
Let's consider an analogy with "regular" values. We can take two integer values and combine them using the + operator to obtain a new integer. Or we can multiply an integer by a floating p...
HTML5 Canvas vs. SVG vs. div
...The short answer:
SVG would be easier for you, since selection and moving it around is already built in. SVG objects are DOM objects, so they have "click" handlers, etc.
DIVs are okay but clunky and have awful performance loading at large numbers.
Canvas has the best performance hands-down, but y...
How to embed a text file in a .NET assembly?
...ould like to embed a text file in an assembly so that I can load the text without having to read it from disk, and so that everything I need is contained within the exe. (So that it's more portable)
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